/Engine/Source/Runtime/GeometryCore/Public/Implicit/Solidify.h
Set cell size to hit the target voxel count along the max dimension of the bounds
void SetCellSizeAndExtendBounds ( const [FAxisAlignedBox3d](API\Runtime\GeometryCore\FAxisAlignedBox3d) & Bounds, double ExtendBoundsIn, int TargetOutputVoxelCount )